43423632449 has 2 divisors, whose sum is σ = 43423632450. Its totient is φ = 43423632448.

The previous prime is 43423632433. The next prime is 43423632523. The reversal of 43423632449 is 94423632434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30973536049 + 12450096400 = 175993^2 + 111580^2 .

It is a cyclic number.

It is not a de Polignac number, because 43423632449 - 2⁴ = 43423632433 is a prime.

It is a super-2 number, since 2×43423632449² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43423632949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21711816224 + 21711816225.

It is an arithmetic number, because the mean of its divisors is an integer number (21711816225).

Almost surely, 2^43423632449 is an apocalyptic number.

It is an amenable number.

43423632449 is a deficient number, since it is larger than the sum of its proper divisors (1).

43423632449 is an equidigital number, since it uses as much as digits as its factorization.

43423632449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 44.

The spelling of 43423632449 in words is "forty-three billion, four hundred twenty-three million, six hundred thirty-two thousand, four hundred forty-nine".